Product description
Digital temperature and humidity sensor DHT22 / AM2302 / RHT03. The sensor uses a capacitive humidity sensor and a thermistor to measure the ambient humidity and temperature. Measurement data is transmitted digitally via a separate data line. The sensor has three connection wires for supply voltage, data, and ground. A 5.1 kΩ pull-up resistor between VCC and DATA is required (not included). The maximum update rate is 0.5 Hz, corresponding to one new measurement every two seconds.
Specifications:
- Sensor type: Temperature and humidity sensor
- Sensor type: DHT22 / AM2302 / RHT03
- Sensing element: Polymer-based capacitive humidity sensor
- Supply voltage: 3–5.5 V
- Current consumption (max): 2.5 mA during measurement
- Humidity measurement range: 0–100 % RH
- Humidity accuracy: 2–5 %
- Humidity resolution: 0.1 % RH
- Temperature measurement range: -40 to +80 °C
- Temperature accuracy: ±0.5 °C
- Humidity resolution: 0.1 % RH
- Sampling rate (max): 0.5 Hz
- Connection: 3 wires (max. 50–100 meters)
- Communication: Digital 1-wire bus
Connections:
- Pin 1: VDD
- Pin 2: DATA
- Pin 3: GND
- Pin 4: GND
